SMTL ID : 9csz.1

Crystallographic structure of M271 a new Kunitz-STI from potato

Coordinates

PDB Format Compare

Method

X-RAY DIFFRACTION 1.65 Å

Oligo State

homo-dimer

Ligands

9 x GOL: GLYCEROL(Non-functional Binders)

GOL.1: 8 residues within 4Å: Chain A: R.67, Q.85, N.87, I.88, T.90 Chain B: H.191, H.192, H.193 4 PLIP interactions: 3 interactions with chain B, 1 interactions with chain A Hydrogen bonds: B:H.191, B:H.192, B:H.193, A:R.67 GOL.2: 5 residues within 4Å: Chain A: R.23, I.25, D.35, S.62, Q.187 11 PLIP interactions: 11 interactions with chain A Hydrogen bonds: A:R.23, A:Q.187, A:Q.187 Water bridges: A:S.26, A:G.34, A:D.35, A:D.35, A:D.58, A:P.61, A:S.62, A:S.62 GOL.3: 9 residues within 4Å: Chain A: A.123, S.125, S.126, Y.127, Y.142, P.144, L.145, T.146, F.149 8 PLIP interactions: 8 interactions with chain A Hydrogen bonds: A:A.123, A:S.126, A:Y.142, A:Y.142, A:L.145, A:T.146 Water bridges: A:Y.127, A:Y.127 GOL.4: 5 residues within 4Å: Chain A: L.38, T.64 Chain B: P.61, S.62 Ligands: GOL.11 2 PLIP interactions: 2 interactions with chain A Hydrogen bonds: A:L.38, A:T.64 GOL.5: 0 residues within 4Å: (No contacts) 1 PLIP interactions: 1 interactions with chain A Water bridges: A:A.74 GOL.8: 8 residues within 4Å: Chain A: H.191, H.192, H.193, H.194 Chain B: R.67, Q.85, N.87, I.88 4 PLIP interactions: 1 interactions with chain B, 3 interactions with chain A Hydrogen bonds: B:R.67, A:H.191, A:H.192, A:H.194 GOL.9: 7 residues within 4Å: Chain B: Y.37, R.54, Y.55, N.56, K.171, R.172 Ligands: ETE.6 4 PLIP interactions: 4 interactions with chain B Hydrogen bonds: B:Y.37, B:R.54, B:N.56, B:R.172 GOL.10: 2 residues within 4Å: Chain B: N.104, I.105 2 PLIP interactions: 2 interactions with chain B Hydrogen bonds: B:N.104, B:I.105 GOL.11: 6 residues within 4Å: Chain A: P.61, S.62 Chain B: L.38, T.64, I.88 Ligands: GOL.4 4 PLIP interactions: 4 interactions with chain B Hydrogen bonds: B:L.38, B:L.38 Water bridges: B:Y.55, B:T.64

1 x ETE: 2-{2-[2-2-(METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL(Non-covalent)

ETE.6: 13 residues within 4Å: Chain A: Y.55, S.57, V.59, G.60, P.61, K.171 Chain B: Y.37, Y.55, N.56, S.57, V.59, P.61 Ligands: GOL.9 5 PLIP interactions: 4 interactions with chain B, 1 interactions with chain A Hydrogen bonds: B:N.56, B:S.57, B:S.57 Water bridges: B:K.171, A:N.56

1 x MAN: alpha-D-mannopyranose(Non-covalent)

MAN.7: 9 residues within 4Å: Chain B: L.9, D.10, T.11, G.13, K.132, F.136, G.137, Y.138, L.185 6 PLIP interactions: 6 interactions with chain B Hydrophobic interactions: B:L.9 Hydrogen bonds: B:D.10, B:D.10, B:G.13, B:K.132, B:G.137

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Campuzano-Gonzalez, A. et al., Structural determination of a new non-canonical inhibition complex between porcine trypsin and M271 a potato Kunitz-STI inhibitor. Biochem.Biophys.Res.Commun. (2025)

Release Date

2025-05-14

Peptides

KTI-A protein: AB

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
B

B
A

KTI-A protein

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